In all of my universe I have seen no law of nature, unchanging and inexorable. This universe presents only changing relationships which are sometimes seen as laws by short-lived awareness. These fleshy sensoria which we call self are ephemera withering in the blaze of infinity, fleeting aware of temporary conditions which confine our activities and change as our activities change. If you must label the absolute, use its proper name: Temporary.

The mind can go either direction under stress—toward positive or toward negative: on or off. Think of it as a spectrum whose extremes are unconsciousness at the negative end and hyperconsciousness at the positive end. The way the mind will lean under stress is strongly influenced by training.

Thou shalt not make a machine in the likeness of a human mind.

Demagogues are so easy to identify. They gesture a lot and speak with pulpit rhythms, using words that ring of religious fervour and god-fearing sincerity. Sincerity with nothing behind it takes so much practice. The practice can always be detected. Repetition. Great attempts to keep your attention on words.

He who can destroy a thing, can control a thing.

The function of science fiction is not always to predict the future but sometimes to prevent it.

We can say that Maud'Dib learned rapidly because his first training was in how to learn. And the first lesson of all was the basic trust that he could learn.